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   <div id="projectname">gbmath
   &#160;<span id="projectnumber">v0.051</span>
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   <div id="projectbrief">c++ math library</div>
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<div class="title">triangle_2d.h</div>  </div>
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<a href="triangle__2d_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;﻿</div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#ifndef __GBMATH_H__</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor"></span><span class="preprocessor">    #error  DO NOT INCLUDE THIS FILE. USE:   #include &lt;gbmath/_gbmath.h&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160; </div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keyword">namespace </span>gbmath</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;{</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html">   18</a></span>&#160;        <span class="keyword">class </span><a class="code" href="classgbmath_1_1triangle__2d.html" title="Triangle by three points. ">triangle_2d</a> </div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;        {</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;        <span class="keyword">public</span>:</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;        </div>
<div class="line"><a name="l00022"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff">   22</a></span>&#160;             <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>   <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>; </div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f">   23</a></span>&#160;             <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>   <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>; </div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1">   24</a></span>&#160;             <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>   <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>; </div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#add9f464216450b9c154eba50dec1aa56">   27</a></span>&#160;            <span class="keyword">inline</span> <a class="code" href="classgbmath_1_1triangle__2d.html#add9f464216450b9c154eba50dec1aa56">triangle_2d</a>() </div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;            {</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;            }</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#acd89c330d78baf0c1f8c49aaaeb16fba">   32</a></span>&#160;            <span class="keyword">inline</span> <a class="code" href="classgbmath_1_1triangle__2d.html#acd89c330d78baf0c1f8c49aaaeb16fba">triangle_2d</a>(<span class="keyword">const</span> <a class="code" href="classgbmath_1_1triangle__2d.html" title="Triangle by three points. ">triangle_2d</a>&amp; t)</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;            {</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;                *<span class="keyword">this</span> = t;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;            }</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a30f1e4bd67bb742bde7e3097e0a34c53">   37</a></span>&#160;            <span class="keyword">inline</span> <a class="code" href="classgbmath_1_1triangle__2d.html#a30f1e4bd67bb742bde7e3097e0a34c53">triangle_2d</a>(<span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> _p1, <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> _p2, <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> _p3)</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;            {</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a> = _p1;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a> = _p2;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a> = _p3;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;            }</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a416f7ab09720b5badf331efd23679443">   44</a></span>&#160;            <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classgbmath_1_1triangle__2d.html#a416f7ab09720b5badf331efd23679443">set</a>(<span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> _p1, <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> _p2, <span class="keyword">const</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> _p3)</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;            {</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a> = _p1;   </div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a> = _p2;   </div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a> = _p3;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;            }</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#ab39b20a2666f7cc0cd6acf3c2cdb6ff0">   52</a></span>&#160;            <span class="keyword">inline</span>  <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> <a class="code" href="classgbmath_1_1triangle__2d.html#ab39b20a2666f7cc0cd6acf3c2cdb6ff0" title="Compute and return the middle point of the triangle. ">middle_point</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="keyword">            </span>{</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;                <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a> res;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                res.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a> = (<a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a> + <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a> + <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a>) / 3.0f;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                res.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a> = (<a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a> + <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a> + <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a>) / 3.0f;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;            }</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#ae7c25f03be88a4a33d872a6538aaeecd">   61</a></span>&#160;            <span class="keyword">inline</span> <a class="code" href="classgbmath_1_1triangle__2d.html" title="Triangle by three points. ">triangle_2d</a>&amp; <a class="code" href="classgbmath_1_1triangle__2d.html#ae7c25f03be88a4a33d872a6538aaeecd">offset</a>(<span class="keywordtype">float</span> x, <span class="keywordtype">float</span> y)</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;            {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a> += <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>(x,y);</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a> += <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>(x,y);</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a> += <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>(x,y);</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;            }</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;</div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#ac30a7140d56d98f336258b876c31af1d">   69</a></span>&#160;            <span class="keyword">inline</span> <a class="code" href="classgbmath_1_1triangle__2d.html" title="Triangle by three points. ">triangle_2d</a>&amp; <a class="code" href="classgbmath_1_1triangle__2d.html#ac30a7140d56d98f336258b876c31af1d">offset</a>(<span class="keyword">const</span> <a class="code" href="structgbmath_1_1vec2.html" title="2d-base vector. Corrected by operators epislon ">vec2</a>&amp; val)</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;            {</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a> += val;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a> += val;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;                <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a> += val;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;            }</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a4ecd536ef3a61a98508ce95104a72443">   78</a></span>&#160;            <span class="keyword">operator</span> <span class="keyword">const</span> <span class="keywordtype">float</span>*() <span class="keyword">const</span> </div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;            {</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;                <span class="keywordflow">return</span> &amp;<a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a>;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;            }</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a4910402a2708b0489be93158b3f49c56">   83</a></span>&#160;            <span class="keyword">operator</span>  <span class="keywordtype">float</span>*()  </div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;            {</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                <span class="keywordflow">return</span> &amp;<a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a>;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;            }</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">            #if ( defined(GB_OPENGL) &amp;&amp; defined(__GL_H__)   )</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;            <span class="keyword">inline</span> <span class="keywordtype">void</span> glVertex()</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;            {</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                glVertex3f(<a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a>, <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a>, <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a>.z);</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;                glVertex3f(<a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a>, <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a>, <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>.z);</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;                glVertex3f(<a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>.<a class="code" href="structgbmath_1_1vec2.html#a86ff75c64d87662abfee8c35c5a343d0">x</a>, <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>.<a class="code" href="structgbmath_1_1vec2.html#a9212649e2705d2216739fc89763f00b6">y</a>, <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>.z);</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;            }</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="preprocessor">            #endif</span></div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a7f7e696e8cb5eb0ed318ee87ebfbde52">  103</a></span>&#160;            <span class="keyword">friend</span> std::ostream &amp;<a class="code" href="classgbmath_1_1triangle__2d.html#a7f7e696e8cb5eb0ed318ee87ebfbde52">operator &lt;&lt; </a>( std::ostream &amp;stream, <span class="keyword">const</span> <a class="code" href="classgbmath_1_1triangle__2d.html" title="Triangle by three points. ">triangle_2d</a>&amp; t )</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;            {</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;                stream &lt;&lt; t.<a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; t.<a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; t.<a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a> ;</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;                <span class="keywordflow">return</span> stream;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;            }</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a4069690c68cd65c3cbc9f8003fd8648b">  109</a></span>&#160;            <span class="keyword">operator</span> std::string()<span class="keyword"> const</span></div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;<span class="keyword">            </span>{</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;                std::ostringstream ss;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;                ss &lt;&lt; <a class="code" href="classgbmath_1_1triangle__2d.html#a56e4089204214c9d146f85df8c5e63ff" title="the first point (vertex) triangular ">p1</a> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;                <span class="keywordflow">return</span> ss.str();</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;            }</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="code" href="classgbmath_1_1triangle__2d.html#a36045212ceb794a8cfc56195f89b6713">  116</a></span>&#160;            <span class="keywordtype">void</span> <a class="code" href="classgbmath_1_1triangle__2d.html#a36045212ceb794a8cfc56195f89b6713">operator = </a>(<span class="keyword">const</span> std::string&amp; str) <span class="keywordflow">throw</span> (std::invalid_argument)</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;            {</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                std::istringstream ss(str);</div>
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<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                ss &gt;&gt; <a class="code" href="classgbmath_1_1triangle__2d.html#aeb799ae9927e464a78d7f1eb47f41f2f" title="the second point (vertex) triangular ">p2</a>;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;                ss &gt;&gt; <a class="code" href="classgbmath_1_1triangle__2d.html#a3a9c14043f4a75de347e2fe84ef066f1" title="the second point (vertex) triangular ">p3</a>;</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;                <span class="keywordflow">if</span>( ss.fail() )</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;                {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;                    <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">&quot;bad input string&quot;</span>);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;                }</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;            }</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160; </div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;        };</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;        </div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160; </div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;}</div>
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